公开(公告)号：US11870404B2

公开(公告)日：2024-01-09

申请号：US17320077

申请日：2021-05-13

Applicant: Qualcomm Incorporated

Inventor： Kentaro Yamamoto ,  Aram Akhavan ,  Ganesh Kiran ,  Lei Sun ,  Elias Dagher ,  Dinesh Jagannath Alladi

IPC: H03G3/10 ,  H03G3/30 ,  H03F3/19 ,  H03F3/21 ,  H03M1/12

CPC classification number: H03G3/3036 ,  H03F3/19 ,  H03F3/21 ,  H03M1/124 ,  H03F2200/453

Abstract: An apparatus is disclosed for gain stabilization. In an example aspect, the apparatus includes an amplifier and a gain-stabilization circuit. The amplifier has a gain that is based on a bias voltage and an amplification control signal. The gain-stabilization circuit is coupled to the amplifier and includes a replica amplifier. The replica amplifier has a replica gain that is based on the bias voltage and the amplification control signal. The gain-stabilization circuit is configured to adjust at least one of the bias voltage or the amplification control signal based on a gain error associated with the replica amplifier.

公开(公告)号：US11569832B1

公开(公告)日：2023-01-31

申请号：US17385799

申请日：2021-07-26

Applicant: Qualcomm Incorporated

Inventor： Aram Akhavan ,  Seyed Arash Mirhaj ,  Lei Sun ,  Elias Dagher

IPC: H03M1/10 ,  H04B1/40

Abstract: An apparatus is disclosed for analog-to-digital conversion. In an example aspect, the apparatus includes an analog-to-digital converter (ADC). The ADC includes a reference-crossing detector having an input and an output. The ADC also includes a ramp generator coupled between the output of the reference-crossing detector and the input of the reference-crossing detector. The ADC further includes a voltage shifter coupled between the output of the reference-crossing detector and the input of the reference-crossing detector.

公开(公告)号：US20220368299A1

公开(公告)日：2022-11-17

申请号：US17320077

申请日：2021-05-13

Applicant: Qualcomm Incorporated

Inventor： Kentaro Yamamoto ,  Aram Akhavan ,  Ganesh Kiran ,  Lei Sun ,  Elias Dagher ,  Dinesh Jagannath Alladi

IPC: H03G3/30 ,  H03M1/12 ,  H03F3/19 ,  H03F3/21

Abstract: An apparatus is disclosed for gain stabilization. In an example aspect, the apparatus includes an amplifier and a gain-stabilization circuit. The amplifier has a gain that is based on a bias voltage and an amplification control signal. The gain- stabilization circuit is coupled to the amplifier and includes a replica amplifier. The replica amplifier has a replica gain that is based on the bias voltage and the amplification control signal. The gain-stabilization circuit is configured to adjust at least one of the bias voltage or the amplification control signal based on a gain error associated with the replica amplifier.

公开(公告)号：US20230100825A1

公开(公告)日：2023-03-30

申请号：US17484581

申请日：2021-09-24

Applicant: Qualcomm Incorporated

Inventor： Seyed Arash Mirhaj ,  Lei Sun ,  Yuhua Guo ,  Elias Dagher ,  Aram Akhavan ,  Yan Wang ,  Dinesh Jagannath Alladi

IPC: H03M1/16 ,  H03M1/38

Abstract: An apparatus is disclosed for pipelined analog-to-digital conversion. In an example aspect, the apparatus includes a pipelined analog-to-digital converter (ADC). The pipelined ADC includes a first stage and a second stage. The first stage includes a sampler and a quantizer coupled to the sampler. The first stage also includes a current distribution circuit coupled to the sampler. The second stage includes a sampler coupled to the current distribution circuit and a quantizer coupled to the sampler of the second stage.

公开(公告)号：US20230024282A1

公开(公告)日：2023-01-26

申请号：US17385799

申请日：2021-07-26

Applicant: Qualcomm Incorporated

Inventor： Aram Akhavan ,  Seyed Arash Mirhaj ,  Lei Sun ,  Elias Dagher

IPC: H03M1/10

Abstract: An apparatus is disclosed for analog-to-digital conversion. In an example aspect, the apparatus includes an analog-to-digital converter (ADC). The ADC includes a reference-crossing detector having an input and an output. The ADC also includes a ramp generator coupled between the output of the reference-crossing detector and the input of the reference-crossing detector. The ADC further includes a voltage shifter coupled between the output of the reference-crossing detector and the input of the reference-crossing detector.

公开(公告)号：US11770129B2

公开(公告)日：2023-09-26

申请号：US17484581

申请日：2021-09-24

Applicant: Qualcomm Incorporated

Inventor： Seyed Arash Mirhaj ,  Lei Sun ,  Yuhua Guo ,  Elias Dagher ,  Aram Akhavan ,  Yan Wang ,  Dinesh Jagannath Alladi

IPC: H03M1/06 ,  H03M1/16 ,  H03M1/38 ,  H04B1/40

CPC classification number: H03M1/167 ,  H03M1/38 ,  H04B1/40

Abstract: An apparatus is disclosed for pipelined analog-to-digital conversion. In an example aspect, the apparatus includes a pipelined analog-to-digital converter (ADC). The pipelined ADC includes a first stage and a second stage. The first stage includes a sampler and a quantizer coupled to the sampler. The first stage also includes a current distribution circuit coupled to the sampler. The second stage includes a sampler coupled to the current distribution circuit and a quantizer coupled to the sampler of the second stage.

公开(公告)号：US11569837B1

公开(公告)日：2023-01-31

申请号：US17403683

申请日：2021-08-16

Applicant: QUALCOMM Incorporated

Inventor： Aram Akhavan ,  Kentaro Yamamoto ,  Lei Sun ,  Ganesh Kiran

IPC: H03M1/12 ,  H03M1/16 ,  H03F3/45

Abstract: Techniques and apparatus for output common-mode control of dynamic amplifiers, as well as analog-to-digital converters (ADCs) and other circuits implemented with such dynamic amplifiers. One example amplifier circuit includes a dynamic amplifier and a current source. The dynamic amplifier generally includes differential inputs, differential outputs, transconductance elements coupled to the differential inputs, a first set of capacitive elements coupled to the differential outputs, and a control input for controlling a time length of amplification for the dynamic amplifier. The current source is configured to generate an output current such that portions of the output current are selectively applied to the differential outputs of the dynamic amplifier during at least a portion of the time length of amplification.